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CVE-2021-1871 Code injection

Urgent
Remediate Within one Week

CVE Information

Original CVE data

Published:
Updated:

A logic issue was addressed with improved restrictions. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..

CWE:
CVSS v27.5
AV:N/AC:L/AU:N/C:P/I:P/A:P
CVSS v39.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
https://support.apple.com/en-us/HT212146
https://support.apple.com/en-us/HT212147
https://www.debian.org/security/2021/dsa-4923
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/
Affected Vendors

Apple - (4)

Debian - (1)

Fedoraproject - (1)

Basic Analysis

Common vulnerability metrics

Vulnerabilty type as detected by PRIOnengine

Code injection

CVSS Scores as calculated by PRIOnengine
CVSS v26.8
AV:N/AC:M/AU:N/C:P/I:P/A:P
CVSS v38.4
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
MITRE CWE Top 25

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Exploits

Exploits are available either through exploit packs, Github repos or the world wide web in general.

Active Exploitation

Vulnerability is referenced under CISA's Known Exploited Vulnerabilities (KEV) catalog. See the KEV Catalog

Social Network Activity

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Threat Actor Activity

No sightings of the vulnerability within threat reports.

Cybersecurity Frameworks

How the vulnerability maps against various cybersecurity frameworks

T1499.004 - Endpoint Denial of Service (Application or System Exploitation)
T1203 - Exploitation for Client Execution
T1059 - Command and Scripting Interpreter

Compliance Impact

How the submited vulnerability affects compliance

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Web Application Security Frameworks

Applicable if the issue likely affects a web application

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